A technician applying a lining coat to the inner wall of an emptied water tank
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Water tank sealing in Al Hamdaniyah Jeddah

Al Hamdaniyah is a densely built residential quarter east of King Abdulaziz Airport, with apartment buildings, villas and busy shops. Tanks here are aging and heat and moisture from airport proximity affect them. Sealing protects water from rust and contamination and stops leaks into apartments below.

  • Potable-rated materials

    Linings and disinfectants cleared for drinking water tanks, not general-purpose products.

  • You get the downtime first

    How many hours the tank is out of service, told before we start rather than after we finish.

  • A first-draw flush

    We run the first draw off after refilling, and the tank is not handed back until the water runs clear.

  • Ground and roof tanks

    Villas, apartment blocks and premises that need a written record of each visit.

Why the job is different in Al Hamdaniyah

Most tanks here were built 20 to 30 years ago and salt exposure from airport proximity and high humidity cause rapid rust and deterioration. The method is set out in full on Water tank sealing in detail.

The first reason

Large tanks on apartment building roofs

Al Hamdaniyah apartment buildings have very large tanks on roofs and their weight causes cracks in the ceiling below. Old tanks need floor and wall reconstruction.

The second reason

Salt and moisture from airport proximity

Al Hamdaniyah is close to the airport and winds carry salt and dust from the sea. Salt accumulates on tank surfaces and penetrates concrete fast.

The third reason

Old buildings and failing tanks

Many buildings date from 20 to 30 years ago and tanks leak water. Leaks affect lower apartments and external walls.

The character of Al Hamdaniyah

Mixed district: shops at street level with homes above them

Al Hamdaniyah is a mixed quarter with dense apartment buildings, villas and busy commerce. Tanks in buildings are very large and heavy and sealing needs a large crew and coordination with residents. Villas have smaller tanks and are easier to treat but leakage is common here too.

Before treatment

What we read before any material is opened

A densely built residential quarter east of King Abdulaziz Airport, with apartment buildings, villas and active shops on Al Hamdaniyah Street, hypermarkets on Al Masurah Street and Al Haramain Road on its western edge.

A fine crack running through a concrete wall

Cracking in the wall

Cracks in the floor come from the tank's heavy weight and constant water pressure and need thorough repair.

The junction of a concrete floor and wall inside an empty tank

The floor to wall joint

Pipe connections on large tanks may number 8 or more, and each connection is older than the tank itself.

A coating flaking away from a concrete surface

The condition of the old lining

Internal walls deteriorate from salt and moisture, old paint peels and rust appears on reinforcement.

Limescale deposits inside a water pipe

Sediment and scale

Humidity here is very high from airport proximity and heat, and the tank loses water through rapid evaporation and seepage.

Water pipes passing through a concrete wall

The pipe entries

The foundation beneath the tank suffers from weight and seeping water, cracks start below and spread upward.

A metal cover over a water tank opening

The hatch and the vent

Damp surfaces allow algae and bacteria growth and old sealers become breeding grounds for contamination.

How we work

  1. 1

    Inspect with the tank empty

    We drain it and read the surface dry: whether the water leaves through a crack, a joint or a pipe collar, and what the outer face of the wall and the ceiling below are telling us. A level test with the valves closed separates a leaking tank from leaking pipework.

  2. 2

    Clean and prepare the substrate

    Sediment out, a high pressure wash, the loose old lining and the weak surface layer of the concrete taken back, then dried. The material grips sound substrate and nothing else.

  3. 3

    Make the cracks and joints good

    Cracks are chased out and filled with a repair mortar, a cove is formed where the floor meets the wall, and every pipe collar is treated on its own.

  4. 4

    Lining, fill test, sterilisation

    Successive coats, each run across the one beneath it, on the face the water touches. Then a full cure, a fill with the level watched, and sterilisation with the first fill run to waste before the tank returns to use.

What water tank sealing includes

  • A technician inspecting with a flashlight

    Finding where the water leaves

    Carried out drained and dry: cracks, joints, pipe collars and the outer face of the wall.

  • A metal floor drain

    Draining and sediment removal

    The last of the water and the settled layer on the floor come out, because a lining does not stick over sediment.

  • A gloved hand applying bait into a joint

    Cracks and joints made good

    The crack opened and filled, a cove formed at the floor to wall junction, and each pipe entry worked separately.

  • A spray nozzle in close detail

    Lining coats on the water face

    More than one coat, each crossing the one below, in material made for drinking water tanks rather than roof waterproofing.

  • A clean kitchen counter after treatment

    Curing, fill test and sterilisation

    The material is left to cure, the tank is filled and the level watched, then sterilised and the first fill run to waste. How long the cure takes follows the material and the weather, and we tell you before the date so you can plan around the supply.

  • The visit report being written on a clipboard

    A follow-up level check

    We come back once it is in service to read the level and check the outer face, because any remaining loss shows up then rather than on the day of the work.

What is different about Taybah Sub-Municipality

Taybah sub municipality covers the newly built districts of north east Jeddah along Al Haramain Road and Asfan Road. New villas and apartment buildings stand among vacant plots, building sites and half finished subdivisions. Al Hamdaniyah is the oldest and densest part with its markets and shops, while Al Furusiyah, Al Bashair, Al Rahmaniyah, Al Falah and Al Salihiyah are mostly recent. The ground is inland and away from the sea, dry and dusty, rest houses, camps and stables on the fringes draw flies and crawling insects, and constant digging and construction stirs rodents out of the empty plots.

Questions about this district

Why is tank leakage so common in Al Hamdaniyah?

Tanks are old and water loss is normal. Salt, moisture and repeated heat cycles make concrete very brittle.

Does salt from the airport speed up tank deterioration?

Yes very much. Salt enters concrete and causes rust inside reinforcement, which makes it crumble fast.

Does treating the tank stop leaks into the apartment below?

If the leak is from the tank itself, sealing stops it. But if ceiling damage is deep, we may need to repair the ceiling too.

How long does sealing a large apartment building tank take?

It depends on tank size. A large tank may take two or three days and residents need water from a backup tank.

Do old tanks need complete emptying before sealing?

Yes, and this is difficult in Al Hamdaniyah because many residents rely on one tank. We need a plan to supply water during treatment.

Does sealing method differ for large tanks?

Yes. Large tanks need section-by-section treatment and crack repair may be deeper and longer than in small tanks.

How much does water tank sealing in Al Hamdaniyah cost?

It is set after the inspection, because the price follows the type of infestation, the size of the space, how far it has spread and the number of visits it needs. Send a photo and a description on WhatsApp and we will give you an estimate before we reach Al Hamdaniyah.

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